Steam-engine governor



R M R w? 0 LG E N GM .N BE m T S (No Model.)

No. 406,510. Patented July 9, 1889.

' wue/wto c $5 91in a ttoznegw ji-wzw UNITED STATES 1 PATENT OFFICE.

FREMONT E. -GrAYLORD, OF KANSAS CITY,,MISSOURI.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 406,510, dated July 9,1889.

. Application filed September 8, 1888. Serial No. 284,887. (No model.)

To all whom it may concern:

Be it known that I, FREMONT E. GAYLORD, of Kansas City, Jackson county,Missouri, have invented certain new and useful Improvements inSteam-Engine Governors, of which the following is a full, clear, andexact description, reference being bad to the accompanyin g drawings,forming a part hereof. This invention relates to that class of devicescommonly known as shaft-governors, and it consists in the novelconstruction, combination, and arrangement of parts, hereinafter setforth, and pointed out in the claim.

In the drawings, which illustrate the inven- I 3 tion, Figure 1 is aside elevation of the devices constituting my invention, withsteam-chest and cylinder in section. Fig. 2 is an end view with parts insection. Fig. 3 is a side elevation of a fly-wheel and centrifugalweights at- 4 is a detail plan view of an eccentric-rod or, rather, acam-rod; and Fig. 5 is a detail view, in perspective, of certain devicesfor changing the relative positionof the cam-plate and the main shaft ofthe engine.

H represents the main shaft, which is to be set in motion by the pistonin cylinder K in the usual manner, and upon which is keyed or otherwiserigidly mounted a slide-block D, and in turn a cam-plateA (of suitablesize) is loosely mounted on said block, so that its position maybechanged by the action of centrifugal weights B, as will be presentlydescribed. Said block D is preferably made rectangular in general form,and is provided with grooves 13 in opposite edges and with asuitablesocket 16 in one end. Said cam-plate A, which in this invention isdesigned to act in lieu of the usual eccentric, is provided with anopening A, that is located a short distance from the center of saidplate, and said opening is provided with slideways 12, corresponding togrooves 13 in block D, and said cam-plate is mounted upon this block,with its slideways engaging the grooves in the block. Said cam-plate isalso provided with grooves fin its opposite sides, which extend aroundnear to its edge or circumference, and which are engaged by suitablepins or rollers f, carried by the shaft 50 end of cam-rod h.

It will be observed that the circumference.

tached, used in making up the invention. Fig.

of the cam-plate, and consequently the grooves f, is irregular in form,made so for purposes hereinafter described. The shaft end of camrod 1)is forked and provided with pins or rollers 5 5 f, whichengagecorresponding grooves f in the cam-plate, while its opposite end isconnected to any suitable form of valve 0, which latter is located insteam-chest carried by cylinder K, the latter being provided with theusual piston, ports (Z and d, &c. Said cam-rod is also mounted insuitable stationary bearings, such as 14, so that it will move only in astraight line, and thereby impart a rectilinear motion to the valve c orvalve-rod.

The length of opening or slot Ain camplate A is only suffi cient togovern the point of 'cut-off'and control the engine when running in onedirection. Likewise it may be stated that the grooves in said plate canbe arranged in true circles without interfering with the successfuloperation of the invention, said grooves being formed irregularly, assho wn,for the purpose of accelerating and decreasing the speed of thevalve atcertain points in its stroke, 7 5 but which need not be dweltupon at this time.

At one end of slot A in the cam-plate a threaded socket C is formed, anda screwC is located in this socket and carries a small pinion O upon itsfree end. Pinion C is rig-. 8o idly secured upon screw G, and is looselymounted in socket 16 in the end of block D, so that when the pinion isrevolved in either direction said cam-plate will be moved across shaftH, sliding on said block of course, and altering the distance betweenthe shaft and the pins or rollers carried by the end of the can1-rod,and correspondingly altering the throw of the valve, as will beexplained.

The relative position of the cam-plate upon 0 block D is controlled bycentrifugal weights 'B, which are provided with a shank and pivoted at10 to the spokes of fly-Wheel B on opposite sides of the main shaft, sothat they will operate in unison, coiled springs a being attached to theends of said shanks opposite said weights and to the rim of said wheelto return them to normal position when the engine is at rest, andtooppose their centrifugal force during operation.

Connection between pinion ,0 and weights B is made by means of a toothedsegment E,

which is provided with a shank and pivoted at g, to extend inalongitudinal direction, and the end of its shank that is opposite itsteeth is pivotally attached to weight-rod F, other suitable rods Fconnecting this rod F to said weights, as clearly shown.

The operation is as follows: Assuming that the proper tension has beengiven to springs a (which maybe done in any well-known way) and theengine has been started and reached its regular speed, weights B arethrown outwardly, and remain in such position, Fig. 1, so long as thespeed is not decreased. So long as the speed is maintained at properlimit there will be no appreciable movement of said weights. However,should the admission of steam to the cylinder K be of such pressure asto increase the reciprocations of the piston and correspondinglyaccelerate the revolutions of fly-wheel B, then the increasedcentrifugal force will 'act upon weights B and In carrying out myinvention it is evident that a number of changes in the details may bemade, and I do not therefore desire to limit myself to the exactconstruction of details that I here show, reserving for myself the rightto make such changes as may properly come within the scope of myinvention.

Having thus described my invention, what I claim is- The combination ofslide-block D with main shaft H, the said block revolving with saidshaft, plate A, having cam-grooves f, and arranged to slide loosely onsaid block, valveoperating rod 1), moved by connection with said plate,screw C, having one end threaded into a socket in plate A, pinion O,mounted on the free end of this screw and located in socket 16 in saidblock D, toothed rack E, pivoted at g and meshing with said pinion,fly-wheel B, mounted on the main shaft adjacent to plate A, weights B,pivoted to the arms of said fly-wheel, opposing springs a, and rods F F,which connect said weights to the toothed rack, substantially asspecified.

In testimony whereof I affix my signature in presence of two witnesses.

FREMONT E. GAYLORD.

\Vitnesscs:

F. G. FISCHER, A. A. HIGDON.

